cpu/pxa/pxafb.c

   1 /*
   2  * PXA LCD Controller
   3  *
   4  * (C) Copyright 2001-2002
   5  * Wolfgang Denk, DENX Software Engineering -- wd@denx.de
   6  *
   7  * See file CREDITS for list of people who contributed to this
   8  * project.
   9  *
  10  * This program is free software; you can redistribute it and/or
  11  * modify it under the terms of the GNU General Public License as
  12  * published by the Free Software Foundation; either version 2 of
  13  * the License, or (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  23  * MA 02111-1307 USA
  24  */
  25
  26 /************************************************************************/
  27 /* ** HEADER FILES                                                      */
  28 /************************************************************************/
  29
  30 #include <config.h>
  31 #include <common.h>
  32 #include <version.h>
  33 #include <stdarg.h>
  34 #include <linux/types.h>
  35 #include <devices.h>
  36 #include <lcd.h>
  37 #include <asm/arch/pxa-regs.h>
  38
  39 /* #define DEBUG */
  40
  41 #ifdef CONFIG_LCD
  42
  43 /*----------------------------------------------------------------------*/
  44 /*
  45  * Define panel bpp, LCCR0, LCCR3 and panel_info video struct for
  46  * your display.
  47  */
  48
  49 #ifdef CONFIG_PXA_VGA
  50 /* LCD outputs connected to a video DAC  */
  51 # define LCD_BPP        LCD_COLOR8
  52
  53 /* you have to set lccr0 and lccr3 (including pcd) */
  54 # define REG_LCCR0      0x003008f8
  55 # define REG_LCCR3      0x0300FF01
  56
  57 /* 640x480x16 @ 61 Hz */
  58 vidinfo_t panel_info = {
  59         vl_col:         640,
  60         vl_row:         480,
  61         vl_width:       640,
  62         vl_height:      480,
  63         vl_clkp:        CFG_HIGH,
  64         vl_oep:         CFG_HIGH,
  65         vl_hsp:         CFG_HIGH,
  66         vl_vsp:         CFG_HIGH,
  67         vl_dp:          CFG_HIGH,
  68         vl_bpix:        LCD_BPP,
  69         vl_lbw:         0,
  70         vl_splt:        0,
  71         vl_clor:        0,
  72         vl_tft:         1,
  73         vl_hpw:         40,
  74         vl_blw:         56,
  75         vl_elw:         56,
  76         vl_vpw:         20,
  77         vl_bfw:         8,
  78         vl_efw:         8,
  79 };
  80 #endif /* CONFIG_PXA_VIDEO */
  81
  82 /*----------------------------------------------------------------------*/
  83 #ifdef CONFIG_SHARP_LM8V31
  84
  85 # define LCD_BPP        LCD_COLOR8
  86 # define LCD_INVERT_COLORS      /* Needed for colors to be correct, but why?    */
  87
  88 /* you have to set lccr0 and lccr3 (including pcd) */
  89 # define REG_LCCR0      0x0030087C
  90 # define REG_LCCR3      0x0340FF08
  91
  92 vidinfo_t panel_info = {
  93         vl_col:         640,
  94         vl_row:         480,
  95         vl_width:       157,
  96         vl_height:      118,
  97         vl_clkp:        CFG_HIGH,
  98         vl_oep:         CFG_HIGH,
  99         vl_hsp:         CFG_HIGH,
 100         vl_vsp:         CFG_HIGH,
 101         vl_dp:          CFG_HIGH,
 102         vl_bpix:        LCD_BPP,
 103         vl_lbw:         0,
 104         vl_splt:        1,
 105         vl_clor:        1,
 106         vl_tft:         0,
 107         vl_hpw:         1,
 108         vl_blw:         3,
 109         vl_elw:         3,
 110         vl_vpw:         1,
 111         vl_bfw:         0,
 112         vl_efw:         0,
 113 };
 114 #endif /* CONFIG_SHARP_LM8V31 */
 115
 116 /*----------------------------------------------------------------------*/
 117 #ifdef CONFIG_HITACHI_SX14
 118 /* Hitachi SX14Q004-ZZA color STN LCD */
 119 #define LCD_BPP         LCD_COLOR8
 120
 121 /* you have to set lccr0 and lccr3 (including pcd) */
 122 #define REG_LCCR0       0x00301079
 123 #define REG_LCCR3       0x0340FF20
 124
 125 vidinfo_t panel_info = {
 126         vl_col:         320,
 127         vl_row:         240,
 128         vl_width:       167,
 129         vl_height:      109,
 130         vl_clkp:        CFG_HIGH,
 131         vl_oep:         CFG_HIGH,
 132         vl_hsp:         CFG_HIGH,
 133         vl_vsp:         CFG_HIGH,
 134         vl_dp:          CFG_HIGH,
 135         vl_bpix:        LCD_BPP,
 136         vl_lbw:         1,
 137         vl_splt:        0,
 138         vl_clor:        1,
 139         vl_tft:         0,
 140         vl_hpw:         1,
 141         vl_blw:         1,
 142         vl_elw:         1,
 143         vl_vpw:         7,
 144         vl_bfw:         0,
 145         vl_efw:         0,
 146 };
 147 #endif /* CONFIG_HITACHI_SX14 */
 148
 149 /*----------------------------------------------------------------------*/
 150
 151 #if LCD_BPP == LCD_COLOR8
 152 void lcd_setcolreg (ushort regno, ushort red, ushort green, ushort blue);
 153 #endif
 154 #if LCD_BPP == LCD_MONOCHROME
 155 void lcd_initcolregs (void);
 156 #endif
 157
 158 #ifdef NOT_USED_SO_FAR
 159 void lcd_disable (void);
 160 void lcd_getcolreg (ushort regno, ushort *red, ushort *green, ushort *blue);
 161 #endif /* NOT_USED_SO_FAR */
 162
 163 void lcd_ctrl_init      (void *lcdbase);
 164 void lcd_enable (void);
 165
 166 int lcd_line_length;
 167 int lcd_color_fg;
 168 int lcd_color_bg;
 169
 170 void *lcd_base;                 /* Start of framebuffer memory  */
 171 void *lcd_console_address;              /* Start of console buffer      */
 172
 173 short console_col;
 174 short console_row;
 175
 176 static int pxafb_init_mem (void *lcdbase, vidinfo_t *vid);
 177 static void pxafb_setup_gpio (vidinfo_t *vid);
 178 static void pxafb_enable_controller (vidinfo_t *vid);
 179 static int pxafb_init (vidinfo_t *vid);
 180 /************************************************************************/
 181
 182 /************************************************************************/
 183 /* ---------------  PXA chipset specific functions  ------------------- */
 184 /************************************************************************/
 185
 186 void lcd_ctrl_init (void *lcdbase)
 187 {
 188         pxafb_init_mem(lcdbase, &panel_info);
 189         pxafb_init(&panel_info);
 190         pxafb_setup_gpio(&panel_info);
 191         pxafb_enable_controller(&panel_info);
 192 }
 193
 194 /*----------------------------------------------------------------------*/
 195 #ifdef NOT_USED_SO_FAR
 196 void
 197 lcd_getcolreg (ushort regno, ushort *red, ushort *green, ushort *blue)
 198 {
 199 }
 200 #endif /* NOT_USED_SO_FAR */
 201
 202 /*----------------------------------------------------------------------*/
 203 #if LCD_BPP == LCD_COLOR8
 204 void
 205 lcd_setcolreg (ushort regno, ushort red, ushort green, ushort blue)
 206 {
 207         struct pxafb_info *fbi = &panel_info.pxa;
 208         unsigned short *palette = (unsigned short *)fbi->palette;
 209         u_int val;
 210
 211         if (regno < fbi->palette_size) {
 212                 val = ((red << 8) & 0xf800);
 213                 val |= ((green << 4) & 0x07e0);
 214                 val |= (blue & 0x001f);
 215
 216 #ifdef LCD_INVERT_COLORS
 217                 palette[regno] = ~val;
 218 #else
 219                 palette[regno] = val;
 220 #endif
 221         }
 222
 223         debug ("setcolreg: reg %2d @ %p: R=%02X G=%02X B=%02X => %04X\n",
 224                 regno, &palette[regno],
 225                 red, green, blue,
 226                 palette[regno]);
 227 }
 228 #endif /* LCD_COLOR8 */
 229
 230 /*----------------------------------------------------------------------*/
 231 #if LCD_BPP == LCD_MONOCHROME
 232 void lcd_initcolregs (void)
 233 {
 234         struct pxafb_info *fbi = &panel_info.pxa;
 235         cmap = (ushort *)fbi->palette;
 236         ushort regno;
 237
 238         for (regno = 0; regno < 16; regno++) {
 239                 cmap[regno * 2] = 0;
 240                 cmap[(regno * 2) + 1] = regno & 0x0f;
 241         }
 242 }
 243 #endif /* LCD_MONOCHROME */
 244
 245 /*----------------------------------------------------------------------*/
 246 void lcd_enable (void)
 247 {
 248 }
 249
 250 /*----------------------------------------------------------------------*/
 251 #ifdef  NOT_USED_SO_FAR
 252 static void lcd_disable (void)
 253 {
 254 }
 255 #endif /* NOT_USED_SO_FAR */
 256
 257 /*----------------------------------------------------------------------*/
 258
 259 /************************************************************************/
 260 /* ** PXA255 specific routines                                          */
 261 /************************************************************************/
 262
 263 /*
 264  * Calculate fb size for VIDEOLFB_ATAG. Size returned contains fb,
 265  * descriptors and palette areas.
 266  */
 267 ulong calc_fbsize (void)
 268 {
 269         ulong size;
 270         int line_length = (panel_info.vl_col * NBITS (panel_info.vl_bpix)) / 8;
 271
 272         size = line_length * panel_info.vl_row;
 273         size += PAGE_SIZE;
 274
 275         return size;
 276 }
 277
 278 static int pxafb_init_mem (void *lcdbase, vidinfo_t *vid)
 279 {
 280         u_long palette_mem_size;
 281         struct pxafb_info *fbi = &vid->pxa;
 282         int fb_size = vid->vl_row * (vid->vl_col * NBITS (vid->vl_bpix)) / 8;
 283
 284         fbi->screen = (u_long)lcdbase;
 285
 286         fbi->palette_size = NBITS(vid->vl_bpix) == 8 ? 256 : 16;
 287         palette_mem_size = fbi->palette_size * sizeof(u16);
 288
 289         debug("palette_mem_size = 0x%08lx\n", (u_long) palette_mem_size);
 290         /* locate palette and descs at end of page following fb */
 291         fbi->palette = (u_long)lcdbase + fb_size + PAGE_SIZE - palette_mem_size;
 292
 293         return 0;
 294 }
 295
 296 static void pxafb_setup_gpio (vidinfo_t *vid)
 297 {
 298         u_long lccr0;
 299
 300         /*
 301          * setup is based on type of panel supported
 302          */
 303
 304         lccr0 = vid->pxa.reg_lccr0;
 305
 306         /* 4 bit interface */
 307         if ((lccr0 & LCCR0_CMS) && (lccr0 & LCCR0_SDS) && !(lccr0 & LCCR0_DPD))
 308         {
 309                 debug("Setting GPIO for 4 bit data\n");
 310                 /* bits 58-61 */
 311                 GPDR1 |= (0xf << 26);
 312                 GAFR1_U = (GAFR1_U & ~(0xff << 20)) | (0xaa << 20);
 313
 314                 /* bits 74-77 */
 315                 GPDR2 |= (0xf << 10);
 316                 GAFR2_L = (GAFR2_L & ~(0xff << 20)) | (0xaa << 20);
 317         }
 318
 319         /* 8 bit interface */
 320         else if (((lccr0 & LCCR0_CMS) && ((lccr0 & LCCR0_SDS) || (lccr0 & LCCR0_DPD))) ||
 321                 (!(lccr0 & LCCR0_CMS) && !(lccr0 & LCCR0_PAS) && !(lccr0 & LCCR0_SDS)))
 322         {
 323                 debug("Setting GPIO for 8 bit data\n");
 324                 /* bits 58-65 */
 325                 GPDR1 |= (0x3f << 26);
 326                 GPDR2 |= (0x3);
 327
 328                 GAFR1_U = (GAFR1_U & ~(0xfff << 20)) | (0xaaa << 20);
 329                 GAFR2_L = (GAFR2_L & ~0xf) | (0xa);
 330
 331                 /* bits 74-77 */
 332                 GPDR2 |= (0xf << 10);
 333                 GAFR2_L = (GAFR2_L & ~(0xff << 20)) | (0xaa << 20);
 334         }
 335
 336         /* 16 bit interface */
 337         else if (!(lccr0 & LCCR0_CMS) && ((lccr0 & LCCR0_SDS) || (lccr0 & LCCR0_PAS)))
 338         {
 339                 debug("Setting GPIO for 16 bit data\n");
 340                 /* bits 58-77 */
 341                 GPDR1 |= (0x3f << 26);
 342                 GPDR2 |= 0x00003fff;
 343
 344                 GAFR1_U = (GAFR1_U & ~(0xfff << 20)) | (0xaaa << 20);
 345                 GAFR2_L = (GAFR2_L & 0xf0000000) | 0x0aaaaaaa;
 346         }
 347         else
 348         {
 349                 printf("pxafb_setup_gpio: unable to determine bits per pixel\n");
 350         }
 351 }
 352
 353 static void pxafb_enable_controller (vidinfo_t *vid)
 354 {
 355         debug("Enabling LCD controller\n");
 356
 357         /* Sequence from 11.7.10 */
 358         LCCR3  = vid->pxa.reg_lccr3;
 359         LCCR2  = vid->pxa.reg_lccr2;
 360         LCCR1  = vid->pxa.reg_lccr1;
 361         LCCR0  = vid->pxa.reg_lccr0 & ~LCCR0_ENB;
 362         FDADR0 = vid->pxa.fdadr0;
 363         FDADR1 = vid->pxa.fdadr1;
 364         LCCR0 |= LCCR0_ENB;
 365
 366         CKEN |= CKEN16_LCD;
 367
 368         debug("FDADR0 = 0x%08x\n", (unsigned int)FDADR0);
 369         debug("FDADR1 = 0x%08x\n", (unsigned int)FDADR1);
 370         debug("LCCR0 = 0x%08x\n", (unsigned int)LCCR0);
 371         debug("LCCR1 = 0x%08x\n", (unsigned int)LCCR1);
 372         debug("LCCR2 = 0x%08x\n", (unsigned int)LCCR2);
 373         debug("LCCR3 = 0x%08x\n", (unsigned int)LCCR3);
 374 }
 375
 376 static int pxafb_init (vidinfo_t *vid)
 377 {
 378         struct pxafb_info *fbi = &vid->pxa;
 379
 380         debug("Configuring PXA LCD\n");
 381
 382         fbi->reg_lccr0 = REG_LCCR0;
 383         fbi->reg_lccr3 = REG_LCCR3;
 384
 385         debug("vid: vl_col=%d hslen=%d lm=%d rm=%d\n",
 386                 vid->vl_col, vid->vl_hpw,
 387                 vid->vl_blw, vid->vl_elw);
 388         debug("vid: vl_row=%d vslen=%d um=%d bm=%d\n",
 389                 vid->vl_row, vid->vl_vpw,
 390                 vid->vl_bfw, vid->vl_efw);
 391
 392         fbi->reg_lccr1 =
 393                 LCCR1_DisWdth(vid->vl_col) +
 394                 LCCR1_HorSnchWdth(vid->vl_hpw) +
 395                 LCCR1_BegLnDel(vid->vl_blw) +
 396                 LCCR1_EndLnDel(vid->vl_elw);
 397
 398         fbi->reg_lccr2 =
 399                 LCCR2_DisHght(vid->vl_row) +
 400                 LCCR2_VrtSnchWdth(vid->vl_vpw) +
 401                 LCCR2_BegFrmDel(vid->vl_bfw) +
 402                 LCCR2_EndFrmDel(vid->vl_efw);
 403
 404         fbi->reg_lccr3 = REG_LCCR3 & ~(LCCR3_HSP | LCCR3_VSP);
 405         fbi->reg_lccr3 |= (vid->vl_hsp ? LCCR3_HorSnchL : LCCR3_HorSnchH)
 406                         | (vid->vl_vsp ? LCCR3_VrtSnchL : LCCR3_VrtSnchH);
 407
 408
 409         /* setup dma descriptors */
 410         fbi->dmadesc_fblow = (struct pxafb_dma_descriptor *)((unsigned int)fbi->palette - 3*16);
 411         fbi->dmadesc_fbhigh = (struct pxafb_dma_descriptor *)((unsigned int)fbi->palette - 2*16);
 412         fbi->dmadesc_palette = (struct pxafb_dma_descriptor *)((unsigned int)fbi->palette - 1*16);
 413
 414         #define BYTES_PER_PANEL ((fbi->reg_lccr0 & LCCR0_SDS) ? \
 415                 (vid->vl_col * vid->vl_row * NBITS(vid->vl_bpix) / 8 / 2) : \
 416                 (vid->vl_col * vid->vl_row * NBITS(vid->vl_bpix) / 8))
 417
 418         /* populate descriptors */
 419         fbi->dmadesc_fblow->fdadr = (u_long)fbi->dmadesc_fblow;
 420         fbi->dmadesc_fblow->fsadr = fbi->screen + BYTES_PER_PANEL;
 421         fbi->dmadesc_fblow->fidr  = 0;
 422         fbi->dmadesc_fblow->ldcmd = BYTES_PER_PANEL;
 423
 424         fbi->fdadr1 = (u_long)fbi->dmadesc_fblow; /* only used in dual-panel mode */
 425
 426         fbi->dmadesc_fbhigh->fsadr = fbi->screen;
 427         fbi->dmadesc_fbhigh->fidr = 0;
 428         fbi->dmadesc_fbhigh->ldcmd = BYTES_PER_PANEL;
 429
 430         fbi->dmadesc_palette->fsadr = fbi->palette;
 431         fbi->dmadesc_palette->fidr  = 0;
 432         fbi->dmadesc_palette->ldcmd = (fbi->palette_size * 2) | LDCMD_PAL;
 433
 434         if( NBITS(vid->vl_bpix) < 12)
 435         {
 436                 /* assume any mode with <12 bpp is palette driven */
 437                 fbi->dmadesc_palette->fdadr = (u_long)fbi->dmadesc_fbhigh;
 438                 fbi->dmadesc_fbhigh->fdadr = (u_long)fbi->dmadesc_palette;
 439                 /* flips back and forth between pal and fbhigh */
 440                 fbi->fdadr0 = (u_long)fbi->dmadesc_palette;
 441         }
 442         else
 443         {
 444                 /* palette shouldn't be loaded in true-color mode */
 445                 fbi->dmadesc_fbhigh->fdadr = (u_long)fbi->dmadesc_fbhigh;
 446                 fbi->fdadr0 = (u_long)fbi->dmadesc_fbhigh; /* no pal just fbhigh */
 447         }
 448
 449         debug("fbi->dmadesc_fblow = 0x%lx\n", (u_long)fbi->dmadesc_fblow);
 450         debug("fbi->dmadesc_fbhigh = 0x%lx\n", (u_long)fbi->dmadesc_fbhigh);
 451         debug("fbi->dmadesc_palette = 0x%lx\n", (u_long)fbi->dmadesc_palette);
 452
 453         debug("fbi->dmadesc_fblow->fdadr = 0x%lx\n", fbi->dmadesc_fblow->fdadr);
 454         debug("fbi->dmadesc_fbhigh->fdadr = 0x%lx\n", fbi->dmadesc_fbhigh->fdadr);
 455         debug("fbi->dmadesc_palette->fdadr = 0x%lx\n", fbi->dmadesc_palette->fdadr);
 456
 457         debug("fbi->dmadesc_fblow->fsadr = 0x%lx\n", fbi->dmadesc_fblow->fsadr);
 458         debug("fbi->dmadesc_fbhigh->fsadr = 0x%lx\n", fbi->dmadesc_fbhigh->fsadr);
 459         debug("fbi->dmadesc_palette->fsadr = 0x%lx\n", fbi->dmadesc_palette->fsadr);
 460
 461         debug("fbi->dmadesc_fblow->ldcmd = 0x%lx\n", fbi->dmadesc_fblow->ldcmd);
 462         debug("fbi->dmadesc_fbhigh->ldcmd = 0x%lx\n", fbi->dmadesc_fbhigh->ldcmd);
 463         debug("fbi->dmadesc_palette->ldcmd = 0x%lx\n", fbi->dmadesc_palette->ldcmd);
 464
 465         return 0;
 466 }
 467
 468 /************************************************************************/
 469 /************************************************************************/
 470
 471 #endif /* CONFIG_LCD */